US3373021A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Presensitized positive working lithographic plate
Assignee: Harris Graphics Corp
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Filing: 1964-01-29
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Granted: 1968-03-12
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Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Dolor N Adams
- 👤 Daniel C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:55
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A LITHOGRAPHIC PLATE COMPRISING A SUPPORT MEMBER, AND A LIGHT-SENSITIVE LAYER OVERLAYING THE SUPPORT MEMBER COMPRISING THE REACTION PRODUCT OF A LIGHT-SENSITIVE DIAZO RESIN AND A CYCLOALIPHATIC POLYPHOSHORIC ACID.
Claim 2
Dependent Claim
29 words
A LITHOGRAPHIC PLATE COMPRISING A SUPPORT MEMBER, AND A LIGHT-SENSITIVE LAYER OVERLAYING THE SUPPORT MEMBER COMPRISING THE REACTION PRODUCT OF A LIGHT-SENSITIVE DIAZO RESIN AND A CYCLOALIPHATIC POLYPHOSHORIC ACID.
Claim 3
Independent Claim
49 words
A METHOD OF PREPARING A LITHOGRAPHIC PRINTING PLATE COMPRISING FORMING ON A SUPPORT MEMBER ADAPTED TO DEFINE THE BACKING OF THE PLATE A LAYER COMPRISING THE REACTION PRODUCT OF A LIGHT-SENSITIVE DIAZO RESIN AND A CYCLOALIPHATIC POLYPHOSPHORIC ACID, SAID LAYER BEING NON-REACTIVE WITH THE SUPPORT MEMBER, EXPOSING SELECTED PORTIONS
Claim 4
Independent Claim
49 words
A METHOD OF PREPARING A LITHOGRAPHIC PRINTING PLATE COMPRISING FORMING ON A SUPPORT MEMBER ADAPTED TO DEFINE THE BACKING OF THE PLATE A LAYER COMPRISING THE REACTION PRODUCT OF A LIGHT-SENSITIVE DIAZO RESIN AND A CYCLOALIPHATIC POLYPHOSPHORIC ACID, SAID LAYER BEING NON-REACTIVE WITH THE SUPPORT MEMBER, EXPOSING SELECTED PORTIONS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |